Journalist Valérie Trierweiler Describes Time at Élysée Palace With Hollande

PARIS—The former companion of François Hollande, French journalist Valérie Trierweiler, has published a 320-page tell-all book about her time at the Élysée Palace, threatening to undermine the president's vow to preside over an "exemplary republic" with a partition between his public and private lives.

Short on political revelations, the book draws an unflattering portrait of Mr. Hollande as an indecisive leader by chronicling Ms. Trierweiler's liaison with the Socialist politician—from convulsive passion to an abrupt...